Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ccc0ec6297412d44fc49c85c027792bf31b92da5f3237c4546b10522dcbc2bd' 
  AND token = 'hr2ikF5wGr84jveex7Lje8iDLhRxWXl3buQcOGM+dPU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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