Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1afdf4043ef257e217465e15b849e4e79ca17db4d493e71ed47cecb6335aa9a4' 
  AND token = 'UITU9uLqhwx0yII0R0+YwsRM2i2AW/venjwT45yl+d8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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