Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ddce4947fc09963d1c4faf8190fcfb155e30fb80457472430854cb8a21fbef6' 
  AND token = 'DZeBBlOJVB5l6cf6LoCbtXMja2MAwqqzXSEn35wFTgQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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