Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dde441deb7bf97b0ee7c763b9a020d4a39dc382270eb0945031b8118e9ba0ed2' 
  AND token = '1lSTXDi5dAjousZr4GrIyP4j6SSUPTOh99Yb6aVe4pI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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