Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e3abca9e5dae919b7a196bd4427d4e4d05f6f5ebc64384659c92c0052a1c018' 
  AND token = 'qXtcL3cXYlSlJejnT1DrwPLjUV45Q/S6e1FaFOvvDYc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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