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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '67bae4eeff17a27e003935aa0f5cf60d03425bc1c85fb40f45a9e4470bc00ff3' 
  AND token = 'GeE8GTIkA9+AnUGCpElGzuL7yY37t1PEjH1wZPxd2OM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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