Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8602d661aa58b05cc2e70a503809e5d10e064723391cd44adb0920500fc5ffb3' 
  AND token = 'R96T7Eg3CytxnC4qE7D2aNtSQY4346OlpGRXIS6wiPg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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