Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8cea361c66d293173fc651f2e95cfc5ad88f9885d0f3a6ad431c32d234fe5ea' 
  AND token = 'patUyD1L7rpfi6UhGlCsJKyptCvRjBAWEq6GdgFdb1Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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