SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1c1863a12e95081bb74f8e3820ca50ea53782dd649ff0c22a6c774661edc9c94' 
  AND token = 'fMiI675NOq+YZ1mwiUjUDDNZrQT3omyCv4gmf/Rf64s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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