Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22c6155cea34aea594dc993411a4ce4220e65d67e48e07d811d52c2f791439b4' 
  AND token = 'EJ9bHmmrGCx1wV4gquDM1YDB8gaa9CrPOsvJ2ZwQ0nc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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