Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d685f43c363f122a46e837f89aed9032c3e638f0282a40577e4d1dc799548e9' 
  AND token = 'xlbmSYnjcSEWeGOWv5EybaKzt1m6bUgQSxvhIy79Jmc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}