Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e3c083da9b8ee493584b5da4a77e16a5da8782d27299605b812b7a2eff2dab9' 
  AND token = 'NmrrLofzzH5fienh5Ndx1SWzGCJof8e1M90jZI3kxpM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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