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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2a1e457134b8e62fa0b59ca0527a9070286bc44246e060409ad7f251e670d02' 
  AND token = 'bSJTVorDgz5k7XZEwcq4Abx8iJp/dlO1XpqfqEo2sYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00080

JSON explain

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