Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '31fe7699ce4a83c82674c00cf0d57ea2672fd6535cd7ca973312b877e8e4a9b4' 
  AND token = 'Qp4zeRBl48PiTUqLRtIIHJlhkWKNGnPeXFDsp9hbMOs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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