Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '43fd7796eae2dc4a7cf06416fbb4b7a78f9c49775da76f55bb66a3f1069f926d' 
  AND token = 'z2mCbAP1DX3jmDYyHvOwWogW7vcZXoZH/gcHAF6ZuHU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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