Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af89d3e8fe99f022c379c541531d9136f0b464e1867395b719fb870cb8b95709' 
  AND token = '0w1byNpYkmor6/SYi0t2517glRP6UvPA4S7r09BBtc0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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