Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b40c20841466f04e88ae5ea19f509f82dfe6c2ef88b88d4240a24620851464e' 
  AND token = 'bXP9IgnePV6ZE21k4Ov8mRHodhbEQkyS3PICYMh/1lk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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