SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7c30a3e85c846952d44ef2044e2557a4ec1130fab249491a81d276720079fc4b' 
  AND token = 'eiMz9H+l8Kn2F9VvkVfdaVZkgi3G9jv/a3G4HoTK/qs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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