Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f614ebc4a39f97b72fd2e2f6cc45536346cb20b291f1a124d9de8e8abec906f' 
  AND token = 'agQQY04Pl6uo5sBxvueSkgd1MOQ1eG8Cl2sbZJdbyf8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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