Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45f282dc4f7237e7eed71b57b21f63f03a5d23f3b74643568e47df55208af218' 
  AND token = 'yqSEqR9qkWKbd3iZgIRdHrei82nqdNw8VXIh2JB8BPY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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