Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59a5ac0b4e4ae3f45af73d0c940e6b43f1f9765621cb8c836ac576480e6d42db' 
  AND token = 'HkoFbAyNuj2PVFFuEEHVI5MHn2EwAWqXDA9gXH1pWyo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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