Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c05174fe9981d0ecfe21bfa12780b1a02c2d1b6886a85f3c9f7a9541c7c15fae' 
  AND token = 'rkA5SzZBqb9hh9UIz+Uk9wag0gWKYfTRwthVZhIEh3g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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