Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2c983eb243460a6a64fb603a25bcf6f7f05be5ab113f6d9e858c82a85fc6879' 
  AND token = 'xfj9McxyJD90PHrNpGvm5XNw0v8X0MDE6NFWXqGAwTU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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