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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '883a9650e1d2bce1b018338fe32eaec99454ff3b2ef2075796dd31a8d04a3817' 
  AND token = 'cXJneF/v/6vwbXFomcorPctfBSgMcOTw7UcWtTBTQ+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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