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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '380fcac0585599355b0e0edff3df91a304d03b58b6ada99658888e5d7dbb6784' 
  AND token = 'b0ujAQ4yoIVYUXdq9p1f2dd8C7SZP5v2+BEb18xz6tg=' 
  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"
    }
  }
}