Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56e6a3a66b6f78089455eb1bef5ec28db7c7d647b3e0139c4f9ee20d81ce2586' 
  AND token = 'kQDXNziFCXyNRtzv40FfA4N8HtDIFyFyrJUV0pTWMI4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}