Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c339448a5dbdfd1a0bf3966abe451a5554acf8a7c34028a2f5e33f4959afed6e' 
  AND token = '6o5i7kJEmzvxOb+uhtuhfei7d04mbSbrZ64m4lae6VE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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