Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33a4050b1053a6223a5e204c96fbe9e3e039adb1e4883c997d7c69fa6022ec70' 
  AND token = '1jXDpThQNUn/Mqp6QSTwBNcRNik91MFCfJYYhjFg3mM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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