Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae77e56975043de7462172dccfcec65045a2abea232a3a75255fb6b506430756' 
  AND token = '/7ouMEN+1AO7oVNEJiSOiUyZuLkLIBdIVHE0XpbGOro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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