Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '692ce213ff106e93fc8b4d7d58960d5f8f777319cc0b93d6c8f69dcf633899d0' 
  AND token = 'JuiHhCyPVSE43EASeXBL1/biP8vMiTnFRV7h+BO10zQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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