Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd8fc15068e3c7e66cee83f043ef613402f1ff26bc98a8638ff833487d216c148' 
  AND token = 'R7pfXWIFp9vQbp0Qy83DeUOFyKoRP+fYRe7HZ82Zce8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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