SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '96da761d35b626cfcc59c38246bf36a2d25098d2769ea45b68fdb5b89dc1771f' 
  AND token = 'jH3H64tuSGB3YVfn1V1wWbZK/3LchXm7q9CLqWQmom0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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