Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b30517825e4d4500bf6d3ef29fce5bbb1e7483adf007e91f4c6d024c1a2e43c9' 
  AND token = 'XZuBk9cetsk9JpYX93G3hPFDeTcE61Wu928PoYrXtg4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}