Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0df3cb258e1e6dac97156c0847d1fbbba29925b9bcbc4557c748311e8eae437' 
  AND token = 'zHDwFBSyXydKgJ+KpeS9ONOt+sS522Dp9YeEeR/qujQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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