Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0108c0feebf301c926f6c271216e7126dd63c36677bfe749485f99a960cf77ee' 
  AND token = 'clQa62+WnKcZNUJrOJ3UOg1CK50z3L5TOfqQAvjOSk0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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