Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b085fb7d538609215da3bbffac00ea327b3d1d1d61b405b7ce7d46f7320a72f1' 
  AND token = 'gC1FspNcPDbzbeTHn6g/8wsyYrAr3HZqqKYWyyZtuzo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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