SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24862f62d11c40d58d1d760cbe2bf4dd7ea13493ac59ce28b83d50151e973406' 
  AND token = '4CmLQHXwL3X0ho33d0KzzurbwCt5xFVs+ZujU8hQv7Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}