Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41e01c570b67f1f4c9240b7758b5e5c880cfd0c65a9206137b3b7ae15dcaf13e' 
  AND token = 'fTdvfeuRihxSzxL/R+OVdxy9LqmaFmDYabH+Yw0nlh8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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