Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a1d4bdb1616451c58bd86f645bb207ed3d41573c768ca8c4cd66d44470e4350' 
  AND token = 'PAHW0IFkhLSsngrfsVmCmlPkyAKumcoCOgYnNP81+0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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