Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de9b90afb6c49ab740771e91a9dbb2259e0bbb143ff5001082ff452d6344f69e' 
  AND token = 'grkkNAT76zw0z1c+a4L79kEx3MpKXtDeulcUfrB4WMc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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