Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '219e40ec42066e6d4e9dbf9e13db31d4f544b1b304a4ecaae7c673835d1441c4' 
  AND token = 'zPcN6p3VrYGvss1tvkuhAk5qA+IuXsNkSZ22Hlp4kG4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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