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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '65fc9d507e699394d164fe9e736af5a43c3afae5cee62bb031801d864177e6bb' 
  AND token = 'RypjdJgQa9jU6HMWiVTKU14KeYIKTD16DPH+xS5D1F8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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