Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6bffe4974d3ec34987b1ce9299979e9c673676260862e20bdac5bb21f21203c2' 
  AND token = 'b9aCvDrh23D0tJ/fp7oPDwf40gZlW4v01Nsc+FhUzYM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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