Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d3f26535db58450867286c3580197668c7e76826ba303c99d0cddcfcca29a17' 
  AND token = 'cAF9M7L+Bii7oA79YhVrqQpuL675QT+L8eOOjpwvCb8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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