Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '781e959b52daeafd3d41a80e622a835f496c9c5a5254dc9271cae16ba634f627' 
  AND token = 'Y3J/x0e14DMgfcnnyaO2QV8s9IVvhMWHsE1an23mFD4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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