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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a809880f1264f882b97bbc6b59a8a63b212e0dac3e47d060e7247e92cc6a57d4' 
  AND token = 'E2VXGweypMmp+m3Y6LugU+2G5yclprNYcjysAr/kdYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}