Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '540f62495b564c643648851e836f740f4621b13c3647a73d8ed3751aeb1b280b' 
  AND token = 'Fa2AmFPtia8R9ESC6G/SYP0vZPyIdt3HibQRUTya6M0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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