Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20a1327f1c3f61d44add75a9927917a39b5e1ce9d7621d59448df77bbaa6177e' 
  AND token = 'L5Cb1QfrVo0pVtz9aDL29DNJZ3kxulhrkk2SlkBd62M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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