Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bd9090455fe3a943625e758cc98fb31d655e2b690723c866ef646ebfbeaef97' 
  AND token = 'CFZnMaF2qwzDEc8sdf/8b6NzVUkzekaYjf8SyCyfgoI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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