Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '493904d1d6a8907e79c79e3d08cafc02a8048e222c6263bd611dc706e29fdc82' 
  AND token = '/K7R22TcnQc2uEKGuS7St9C2luG9wabHy2nHqdRr/Uo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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