Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5457f760b696d019c398862760896e410d42dc3670559fd01a7b55132fef7a71' 
  AND token = 'E5YLAOMIekkf9iXCwbxkpyhoqJz94gg5HrGeTTZOWKQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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