Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5db371d4e362cc089b695f5d93608353ab30c1328133193fd63b9211cb560d51' 
  AND token = 'u5jzzydjfFq0bZrPVBvMihqKtjvNniWLxyCa2r2dzdg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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