Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2be385e1af0e428a39597e21b73e5c9298f1c6ce8e82d746b79b98e992a82e38' 
  AND token = 'PECMLPs57F7dxz8hbZi9fusx85oSGwCiuibt7F7Ueyw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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