Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35e63fefc07d17646db7decbefdb2c8f3109d3f017de6bfa41857b13314b460f' 
  AND token = '4EVeSQCw4Nj+2jvjXBybBkGF5yIf0zlxWeKEqDV8bA4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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