Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '945394f022d3622d0af29bf620657531471d3fdc6514c630941c634f10da80e7' 
  AND token = 'XrTwoU1RRKlcHjUE7h49Y8c33lNn3I1379SmrNFZUvg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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