Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0df0cb89e9002a0f4363822663a6804ebde659527007e1ab147082f530d402d' 
  AND token = 'XtcJw1pKa+hcaSEPSI25qC3aAKzGaGrbUPf+NHLv/eE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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