Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a4dd3b73474c6dcb0c7a48a2b367ad0de907fdabad975035e35c0b847f171a2c' 
  AND token = '/9ATAukgdKlbG2qkjUpkNXWg47UZ8PfGo+boTuUFGt8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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