Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e9bc97d71ae3064f83191e0afc8d2e41834e7d178edd0cb1b0b515e7900bf08' 
  AND token = 'f4jw2Q78Jnkr/7o7quMy2WA+dbnt0G5z5sPx1AEdXwM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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