Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e28af41024a73e7af19935a7eaa2dbcb5f8cbe4dcd4a4c4e65378c39a2329ce3' 
  AND token = 'UW2oI2DwTPYr9JYW0Q8AR/90D1KeOu7zC6b26XigMJo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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