Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4cbacc508d78be34cddf97aae12b9316683aa941d47d9047f06ab808b8f15772' 
  AND token = '3b9Nrn/AzV2iWiKGL+zsSyMDdRo4C58I7WBcGXfGCno=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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