Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '22930cb2b04cb6a9d16581012708b1f03fb1fe4aad7ca3a16c2626617ef410c6' 
  AND token = 'g0wuAVyneI6468eJ8sr+EXTLzhwFA+iI8L8GCRJBOzQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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