SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f1eb5f752edd6864a925981bddc1128e026ba3f9854b735ab3f0e6ea63ab75ca' 
  AND token = 'GW8uhmXPa9o41vSNJyCrnVLa1T66zMSlpAgOGg/KSdg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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