Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c765915e4ede65ff301c7ed8545fae5310e2789c0650790795aa7aa747000429' 
  AND token = 'vWqjSF5YS1Xx90c7/LmKOP8AzbmOMU6ggJIP0r/2VC8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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