Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6dd203cc586908cd0bbc4abde370fa21cf7ad9fa228436dfca9addac81293183' 
  AND token = 'iEtNTyysCFgYuYooqQvWKPouW5bBps074sAaJiIr0dA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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