Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb822d9a15bbfa1be1659a86c183cccb759cb68543d9c828962cd7e9dda96ceb' 
  AND token = '4Krgr2muaXWgVAFLdOACHp/Q94XW37Zo/euPHpWhuX4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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